Apparatus for manufacturing sheet-glass.



PATENTED APR. 14, 1903.

- P. T. SIEVERT.

APPARATUS FOR MANUFACTURING SHEET GLASS.

APPLICATION FILED DEC. 26, 1901 110 MODEL.

UNITED STATES PATENT OFFICE.-

PAUL TIIEODOR SIEVERT, or DREsDEN, GERMANY.

SPECIFICATION forming part of Letters Fatent No. 725,498, dated April14, 1903. Application filed December 26, 1901. Serial No. 87,202. (Nomodel.)

T0 (ZZZ wit/0177 zit 711,07 concern.-

Be it known that 1, PAUL THEODOR SIE VERT, a subject of the King ofSaxony, and a resident of Dresden, in the Kingdom of Saxony, GermanEmpire, have invented a new and useful Improvement in Apparatus forManufacturing Sheet-Glass, of which the following is a specification.

This improvement relates to an apparatus for manufacturing sheet-glassby the process which forms the subject-matter of my application SerialNo. 87,201, filed December 26, 1901, for United States patent. Accordingto that process a hot liquid layer of glass is spread out upon theperforated surface of a hollow plate, upon which it is held down by ashape-giving frame and while so held is exposed to an elastic-pressuremedium and thereby expanded into a hollow body, which is so retained inthe final expanding process by a skeleton form or mold that portions ofit are formed into panels, which on being separated and flattened formplates in which the natural fire-polish on the two surfaces of the glassis retained.

Figure 1 is an upright view,partly in section, of a complete apparatusembodying my invention,.showing the hot glassin several stages ofexpanding, the skeleton mold or form being open during such stages ofexpansion. Fig.

2 is a plan corresponding with Fig. 1, partly,

in section, showing the blown-glass body within the closed skeleton formor mold, the upper hollow plate being removed. Fig. 2 represents a partof Fig. 2 on a larger scale. Fig. 3 is an upright view of the apparatuspartly in section and with the skeleton form or mold closedand includingthe blown hollow glass body. Fig. 4: is a plan corresponding with Fig.3, partly in section, showing the blown-glass body within the skeletonform or mold, the upper hollow plate being removed. Fig. 4 represents apart of Fig. 4 on a larger scale. Fig. 5 is a perspective view of aglass body which has been blown out within the skeleton form or mold,but which has been taken out therefrom.

Referring first to Fig. 1, (1. represents the uprights, erected on thebase-plate c and carrying the boxes at, which receive the trunnions b bof the hollow plate I), with perforated surface upon which the hot layerof glass is deposited. The trunnion b is hollowand constitutes theconduit through which the compressed air or other pressure medium entersthe cavity of said plate. 6 is the frame of suitable shape by which theglass layer is held on said perforated surface. The said plate andframe, which are shown upside down, are such as are shown in my UnitedStates Patent No. 641,048, dated January 9, 1900.

The base-plate c has a suitable central opening, around which isarranged the skeleton form or mold composed of fillets d, hinged to saidplate, so that they may be turned, as indicated by the arrows in Fig. 1,to an upright position and may be kept in such position by connectingthem in any suitable manner to the upper frame 6. The said fillets d, bywhich the corners of the hollow glass bodyf are formed, may be spaced toform double edges, as shown in Figs. 2 and 2, or may be arranged to comeclose together to form a single edge, (shown at d in Figs. 4 and 4.)

When the skeleton form or mold represented in Figs. 1 and 2 is closed,its fillets d, presenting double edges, will form at the corners slitswithin which, as shown in Figs. 2, 2 and 5, the glass at the corners ofthe hollow glass body will bulge out, the so-bulgedout parts 01. formingthe separating-lines at which the body may be divided into sheets.

When the skeleton form or mold represented in Figs. 4 and efiis closed,its sharp fillets d", presenting together single edges, will formcorners at which the glass will be bulged inward during expansion, theso-bulged-in parts '11. forming the separating-lines on which to dividethe body into sheets. The fillets d d must be so hinged that if they areclosed to form the skeleton form or mold they may easily be turned awayfrom the bulged-out or bulged-in part of the glass body when the hotglass has solidified so far that the hollow body may be removed from theplate Z) or from the shaping-frame e.

It is indicated in Fig. 1 how the sagging or sinking and the blowing ofthe glass bodyf in the difie'rent stages f f is proceeded with until theclosing of the skeleton form or mold may take place, as shown in Fig. 3,whereupon by the continued blowing out the ball-like body will meetagainst the cornerfillets, thereby, according to Figs. 2, 2, and 5,bulging out at the corners or, and, according to Figs. 3, 4, and 4,bulging in at the corners 'n', the intermediate portions m in both casesbeing expanded outwardly beyond the fillets in the form of panels muntil the admission of the elastic-pressure medium is shut off. The bodynow has the form of a hollow cube or prism with bulged-out sides.

After sufficient solidification of the glass the upright fillets d areturned down and the glass body is removed from the shaping-frame e. Thebody may now be at once divided at its corners n or n by cutting or byany means known to glass-workers into panels an, which have only to beflattened by any of the means known to glass-blowers to produce plates.

[SEAZL] .Vhat I claim as my invention is- In apparatus for themanufacture of sheetglass, the combination of means for expanding a hotlayer of glass to form a hollow body, and a skeleton form or moldconsisting of a base-plate and sharp edged fillets hinged thereto forthe reception of the so-expanded body and the formation of the cornersthereon or therein.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 10th day of December, 1901.

PAUL THEODOR SIEVERT.

Witnesses:

HERNANDO DE SOTO, PAUL ARRAS.

therein that the same may conform to the record of the case in thePatent Ofiice.

Signed and sealed this 21st day of April, A. D., 1903.

F. I. ALLEN, Commissioner of Patents.

It is hereby certified that in Letters Patent No. 725,498, granted April14, 1903, upon the application of Paul Theodor Sievert, of Dresden,Germany, for an improvement in Apparatus for Manufacturing Sheet-Glass,an error appears in the printed specification requiring correction, asfollows: In line 25, page 2, the word the should be stricken out; andthat the said Letters Patent should be read with this correctionfillets, thereby, according to Figs. 2, 2, and 5, bulging out at thecorners or, and, according to Figs. 3, 4, and 4, bulging in at thecorners 'n', the intermediate portions m in both cases being expandedoutwardly beyond the fillets in the form of panels m until the admissionof the elastic-pressure medium is shut off. The body now has the form ofa hollow cube or prism with bulged-out sides.

After sufficient solidification of the glass the upright fillets d areturned down and the glass body is removed from the shaping-frame e. Thebody may now be at once divided at its corners n or n by cutting or byany means known to glass-workers into panels an, which have only to beflattened by any of the means known to glass-blowers to produce plates.

[SEAZL] .Vhat I claim as my invention is- In apparatus for themanufacture of sheetglass, the combination of means for expanding a hotlayer of glass to form a hollow body, and a skeleton form or moldconsisting of a base-plate and sharp edged fillets hinged thereto forthe reception of the so-expanded body and the formation of the cornersthereon or therein.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 10th day of December, 1901.

PAUL THEODOR SIEVERT.

Witnesses:

HERNANDO DE SOTO, PAUL ARRAS.

therein that the same may conform to the record of the case in thePatent Ofiice.

Signed and sealed this 21st day of April, A. D., 1903.

F. I. ALLEN, Commissioner of Patents.

It is hereby certified that in Letters Patent No. 725,498, granted April14, 1903, upon the application of Paul Theodor Sievert, of Dresden,Germany, for an improvement in Apparatus for Manufacturing Sheet-Glass,an error appears in the printed specification requiring correction, asfollows: In line 25, page 2, the word the should be stricken out; andthat the said Letters Patent should be read with this correctionCorrection in Letters Patent No. 725,491

It is hereby certified that in Letters Patent No. 725,498, granted April14, 1903, upon i the application of Paul Theodor Sievert, of Dresden,Germany, for an improvement in an error appears in the printedspecificae 25, page 2, the Word the should be Patent should be read withthis correction Apparatus for Manufacturing Sheet-Glass, tion requiringcorrection, as follows: In lin stricken out; and that the said Letterstherein that the same may conform to the record of the case in thePatent Ofiice.

Signed and sealed this 21st day of April, A. D., 1903.

[SEAL] F. I. ALLEN,

Commissioner of Patents.

